Check-valve.



No. 745,742. PATENTED DEC. 1, 1903.

w. J. TAUBE. I CHECK VALVE.

APPLICATION FILED OUT. 25, 1902.

UNITED STATES Patented December 1, 1903.

WILLIAM J. TAUBE, OF PARKRIDGE, ILLINOIS.

CH ECK- VALVE.

SPECIFICATION forming part of Letters Patent No. 745,742, dated December1, 1903.

Application filed October 25,1902. Serial No. 128,762. (No model.)

10 Ml whom it may concern:

Be it known that I, WILLIAM J. TAUBE, a citizen of the United States,residing at Parkridge, county of Cook, State of Illinois, have inventeda new and useful Check-Valve, of

which the following is a specification.

My invention relates to improvements in check-valves in which a movablevalve is antomatically opened or closed by the flow of the liquid and isshown and described in connection with house-drains for sewers, but canbe used for any other suitable purpose.

The objects of my improvement are, first, to provide an easily-actuatedvalve; second, to afford facilities for the proper adjustment of thevalve; third, to afiord an easy access to the valve; fourth, to provideavalve which will not be afiected by corrosion or rust, and, fifth, toprovide an absolute check for backwater in sewers. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich Figure 1 is a vertical longitudinal section of the deviceembodying my invention; Fig. 2, a plan section on line 2 2 of Fig. 1,and Fig. 3 a cross-section on line 3 3 of Fig. 1.

Similar numerals refer to similar parts throughout the several views.

The valve-chan1ber 5 has the inlet 6 and outlet 7, which are preferablycast integral therewith and are provided with the ordinary pipeconnections. Resting on the edge or flange surrounding the open upperpart of the valve-chamber 5 is the cover 8, and a gashot 9 is preferablyinterposed between the two. An inwardly-projecting flange 10 is shownsecured to and preferably integral with the bottom and two sides of thechamber as one means of securing the valve-seat 11 in proper placeconcentric with the inlet 6. The flange 12 of the valve-seat 11 isslipped down between the flange 10 and the end wall of the chamber 5 andsecured in place by any convenient means, as by bolt 13. A gasket may ormay not be interposed between the valve-seat and the wall of the chamber5.

For convenience this check-valve is often placed underground in theordinary location of drains, and naturally the moisture from the earthcorrodes and rusts the different parts of the valve and chamber. Toovercome the difficulties encountered from this source, the cover 8 isheld secure by having apertures through which the pins or bolts 14:project, and a wedge-shaped key 15 is driven into the transverse hole inthe pin 14 above the cover. The valve-seat 11 is made of somenon-corrosive material, preferably lead, and is shaped to make the bestpossible seat for the valve.

The valve 16 is of spherical or conical contour where it contacts withthe valve-seat 11, but may be of any convenient or desired shapeotherwise and is made of any suitable material. The valve 16 issupported in any convenient manner to normally lie against thevalve-seat 11 and close the passage from the inlet 6. Under ordinaryconditions when the main sewer,with which the outlet 7 connects, is freefrom anyobstructions or overflow the waste-water will flow into thevalve-chamber through the inlet 6 and from thence out through the outlet7 and into the main sewer.

. The force of the water coming in through the inlet 6 will force thevalve 16 back away from the valve-seat 11 a sufficient distance to allowthe water to enter the valve-chamber 5. When, however, the water in themain sewer rises for some reason to a higher level than the water in theinlet 6, the water will also rise in the valve-chamber, as shown in Fig.1 of the drawings, the water having free and uninterrupted access to thechamber from the main sewer through the outlet 7, and will force thevalve 16 against the valve-seat 11 with greater pressure than itnormally is held, thereby absolutely preventing any passage of waterfrom the valve-chamber to the inlet-pipe 6. It is obvious that when thewater in the valve-chamber recedes again to slightly below the level ofthe water in the inlet 6 the flow will be again as formerlydescribedthat is, into the chamber from inlet 6 and out of the chamberthrough outlet 7.

To show one means by which the valve 16 may be supported in place, Ihave illustrated one end of a link 17 loosely connected to the valve 16,while the opposite end of the link is loosely attached to an adjustablebolt 18, which is capable of longitudinal adjustment in the wall of thevalve-chamber by means of the set-nuts 19. The purpose of having the adjustability is to give the valve the desired valve 16, supported by link17 and bolt 18, to normally rest against the valve-seat 11, the flange10 for securing the valve-seat in place, inlet 6, outlet 7, chamber 5,cover 8, pins 14, and wedges 15, allsubstantially as described, for thepurpose specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM J. TAUBE.

Witnesses:

HOWARD CoLLvER, T. J. MCCONLOGUE.

